is an online trading exchange
website whose members speculate on the outcomes of future sports events. Founded by John Delaney in 2000, and located in Dublin
, by 2005 it reported 50,000 members and an average monthly volume of four million trades.
Tradesports' sister website, Intrade.com (founded in 2001 and acquired by Tradesports in 2003), is a prediction market for all non-sports-related events.